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Date: Thu, 11 Nov 2004 09:20:10 +0800
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To: Struts Users Mailing List <user@struts.apache.org>
Subject: Re: <img> vs. <html:img> onclick result
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Lori,
    If pathParam is a bean you pass in through the request or any scope  
you could use
<bean:write> to output the value of the bean without resorting to 
scriplets.



Ben Anderson wrote:

>Lori,
>notice I took this to the struts list.  The struts tags don't support
>runtime expressions.  There is a subset of struts tags that supports
>EL (expression language).  You might try the following approach:
>
><c_rt:set var="pathParam" value="<%= pathParm %>"/>
><html-el:img ... onclick="${pathParam}"/>
>
>However, it'd be even better if you didn't need the first line.  There
>are times when scriplet expressions must be used (static variables),
>but you should try to avoid them when you can.
>
>-Ben
>
>On Wed, 10 Nov 2004 11:10:48 -0800, Cook, Lori A <lori.cook@hp.com> wrote:
>  
>
>>I am experiencing difficulty using tag libraries and the passing through
>>of scripting variables in attributes. Specifically I'm trying to add an
>>onclick value to an <html:img> tag but this is generic for any tag in
>>the Struts libraries where the user can supply a value to an attribute.
>>
>>When the following markup is used in a jsp:
>>    <img src="minor.gif" alt="" onclick="confirmAction(<%= pathParam
>>%>);" />
>>    <img src="minor.gif" alt="" onclick=<%= "\"confirmAction(" +
>>pathParam + ");\"" %> />
>>The resulting HTML is:
>>    <img src="minor.gif" alt="" onclick="confirmAction(Foo);" />
>>    <img src="minor.gif" alt="" onclick="confirmAction(Foo);" />
>>
>>As you can see either one of the jsp versions 'work' to create a good
>>onclick method.
>>
>>But when the code is changed to use the <html:img> tag it doesn't work.
>>That is with the following jsp markup:
>>    <html:img src="normal.gif" alt="" onclick="confirmAction(<%=
>>pathParam %>);" />
>>    <html:img src="normal.gif" alt="" onclick=<%= "\"confirmAction(" +
>>pathParam + ");\"" %> />
>>The resulting HTML is:
>>    <img src="normal.gif" alt="" onclick="confirmAction(<%= pathParam
>>%>);">
>>    <html:img src="normal.gif" alt="" onclick="confirmAction(Foo);" />
>>
>>While the first instance of <html:img> gets changed into the <img>
>>markup the scripting variable pathParam does not get resolved. In the
>>second case the scripting variable gets resolved but the <html:img> does
>>not get changed into its appropriate <img>.
>>
>>Why? And how do you get the correct behavior?
>>
>>Any help is greatly appreciated.
>>Lori Cook
>>
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>>    
>>
>
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